New - fitted before I realised it's too short for the 51T cassette, so taken it straight off. This medium 'GS' cage is for the 45T cassette.
Tiny marks from the b-screw, otherwise immaculate and still with the fresh Shimano grease.
Cheapest I can see online is £155, so this is £130 posted.

I’m tall with long legs and the slackness of most effective seat angle puts me way off the back of the bike, even with saddle slammed forward. Also note how many bikes have steep effective angles but slack actuals (avoiding tyre rub of 29” wheels with short chainstays?), penalising long-legged types who run seatpost heights waaaay above the line where effective angle is measured. Steeper SA is a good change for me!